Box contains 15 items, 4 of which are defective and 11 are good. Two items are selected. What is probability that the first is good and the second defective?

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Mathematics

8 August, 20:18

Box contains 15 items, 4 of which are defective and 11 are good. Two items are selected. What is probability that the first is good and the second defective?

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Answers (2)

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Jakob Moody · Answer 1

Defective 1out of 4

effective 1out of 11

i think

Roberto Garrison · Answer 2

We have an 11 out of 15 chance, that we can pick a good item, and a 4 out of 15 chance at picking a defect.

By multiplying the two probabilities together, we want to simultaneously pick out two items with order.

Thus, the probability is: 11/15 · 4/15 = 44/225